Mechanical movement



F. M. FURBER.

MECHANICAL MOVEMENT.

APPLICATIQN FILED JULY 29. ms.

Patented Jan. 31, 19 22.

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MECHANICAL MOVEMENT. APPLICATION FILED JULY 29.1918.

1,404,753, Patented Jan. 3 22.

2 SHEETS-$11 FREDERICK M. rnnnnn, on n-Evnnn, raassacnnsn'rrs, nssrenon To UN TED snot; MACHINERY conrona'rron, or Para-neon, new JERSEY, A CORPORATION on NEW JERSEY.

MECHANICAL MOVEMENT.

Application filed July 29, 1918. Serial No. 247,215,

To all w 710% it may concern Be it knownthat I, FREDERICK M. F URBER, a citizen of the United States, residing at Revere, in the county of Suffolk and State of Massachusetts, have invented certainlmpro-vements in Mechanical Movements, of

which the following description, in connection with the accompanying drawings, is a specification, like reference characters on the drawings indicating like parts in the several figures. a

This invention relates to mechanism for converting rotary movement into oscillatory movement, and, while primarily intended for use in edge-setting machines, is also useful in other classes of machines.

One of the objections to edgesetting machines of the type in which the tool. is rapidly vibrated to burnish the sole edge while it is held against the tool by the work man, is the excessive amount of vibration of the entire machine, which causes rapid wear of the machine parts, imposes wearying strains upon the workman, and produces much noise. Excessive vibration is due to 0 I e 1 many causes, among which is the high speed at which the driving member must be caused to run 1n machines where such momberrotates oncefor every complete OSCllla'DIOH of the tool-carrying shaft. The foregoing and many other ObjCtlOIlS of mechanlsms as.

heretofore employed for operating edge-setting tools where a high vibratory speed is produced in a driven member from a rotary driving member, are overcome by the presentinvention, in which a compact, efficient, and relatively simple arrangement of parts is employed. i

i :A requirement whichit has been found necessary to meet inthe design of edge set: ters of the best quality is that of'fiexibility in adjustment. It is necessary that the oscillatory speed of the tool and that the throw of the tool. be adjustable to meet the preferences of individual manufacturers with regard to different classes of work. 7

An important feature of the invention is compri'sedin an organization wherein the driving member and driven member he one within the other and are preferably mounted one onthe other and concentrically -arranged, and movement is transmitted from the formerto the latter through devices which include gearing This combination diminished.

pointed out in the claims.

carrying the tool without varying the speed of rotation of the driving member. At the same time, the relation between the driving and driven members makes the mechanism verycom'paot and absorbent of the shocks due to unbalanced moving parts. The reactions of the members are balanced against each "other to a certain extent, instead ofbeing both transmitted to the frame of the machine.- The stresses reaching'the frame and therefore causing vibration are thereby Other features-of the invention consist in certain important details of construction and combinations of parts which will be better understood from the following description, and whlch are more particularly In the drawings, wherein an embodiment oft-he invention is illustrated,

Fig. 1 is a view in side elevation, partly sectional. i I i V Fig. 2 isv a view in elevation, partly sectional, of the oil reservoir takcn in the dircction .ofthe arrow, Fig. 1, the parts being broken away to show the gearing and asso ciated, elements.

1 Fig 3 is a detail view showing the oil reservoir inspection window.-

Fig. 4: is a view in vertical section of the same part, and v r y it Fig.5, shows a pair of gears having a different ratio. r i

The shaft 2 oscillates in bearings sustained by the machine frame 1, one of said bearings being referred to by the numeral 4 The shaft 2 carries two loose pulleys 6, 8, the

former being anjidler and the latter having aqfiange 10, and being'secured by suitable means, as'scre ws 9, toa gear 12 which rotates on the shaft 2 with, the pulley. A

bushing 14-, which is fixed in the frame, surrounds he shaft 2, the bushing having a flange 16 whose outer faceis adjacent to the inner wall: ofa drum or casing. 21, the open end of'which is secured to and closedby the flange 10. The flange 16 of the bushing has. an extension -17 provided with-a split bear- .ing within which is clamped a stud 18 by a screw 19. I On this stud is rotatably mounted a gear QOmeshing with the gear 12. The Y As the gear '12 is rotated by the pulley 8, the

rotatory movement of the latter is, through the described connections, converted into oscillating motion of the shaft- 2. The gear ratio between the gears 12 and 20 is, in the example illustrated, 21, so that for each rotation of the pulley, four oscillatory movements are imparted to the tool carrying shaft, and the vibrations of the burnishing H tool are accordingly twice as many as would be the case if the gear 20 were rotated once for each rotation of the pulley 8.

It will be apparent that by substituting other gears (see Fig. 5) for those shown, in which the gear ratio is different, the s eed of oscillation may be varied at will. t is also apparent thattheamplitude of the vibrations, or extent of throw of the burnishing tool can be varied by changing the amount of eccentricity of the eccentric 22.

The means for transmitting movement between the driving member, or pulley 8, and the driven member, or shaf 2, and which comprises the gears 12 and 20, the eccentric and other connections, are all en closed by the casing 21 and run in oil in said casing. This insures complete lubrication "of the essential working parts, and by minimizing frictioni'keeps them in good running condition and increases their durability.

The flange 10 is provided with an internally screw-threaded opening which receives a threaded bushing 28, provided with afla'nge for seating upon the outside of the flange 10, and a transparent window 30 for inspecting the condition of the oil within the casing.

A driving belt 31 transmits power from any suitable source to the loose pulley 6, and a belt shifter 32; may conveniently be employed for shifting the belt from the loose pulley 6 to the driving pulley 8, and vice versa, for starting and stopping the machine at will. i

' Itis to be observed that the mechanism for converting the rotary movements of the driving pulley into oscillating movement of the tool-carrying shaft is exceedingly compact, s mple, and efficient, in that the driv ingmember and the driven memberare concentrically arranged one within the other.

The arrangement referred to reduces friction ascomparedwith other known devices and,

moreover, permits of the use of simple the required number of oscillatory movements in the burnishing of the tool for each complete rotation of the driving member. It is thus possible to run the pulley 6 at a comparatively low speed and to secure high vibratory speeds by a proper gear ratio. The efiiciency of the edge-setting operation is greatly enhanced by rapid vibration, as high as, for example, 7000 oscillations per minute. This may be easily secured by a pulley rotating at 900 R. P. M. The belt velocity is correspondingly slower and the difficulties due to vibration arerelieved, since the only unbalanced parts in the machine are the eccentric 22 and the fork 26, which are so light in comparison with themass of the uniformly rotating parts that their unbalancing effectis practically masked.

The mounting of all the pulley and heav rotating parts upon the oscillating sha t makes the machine very compact which is of great importance in machines of this kind. It gives the pulley 6 a strong support at each side without requiring another heavy shaft. It permits the assembling of the entire transmission mechanism in a simple compact oil casing.

7 Having thus described my invention, what ters Patent of the United States is:

1. In a mechanism of the character de scribed, the combination with a rotary driving member, of a shaft supported within said member, connections including an eccentric and toothed gearing between said driving member and shaft for converting rotary motion of the driving member'into oscillatory motion of the shaft, and a casing mounted on the driving member and rotating therewith, for containing oil enclosing said connections, the shaft extending throu h the-casing and having a bearing on bothsides thereo f 2, The combination with a rotary driving member, of a shaft supported concentrically within said member, a gear carried by said member, a second gear in mesh with the firstnamed gear, an eccentric carried by said second gear, and connections between said'eccentrio and shaft, said shaft extending continuously through said member and said firstnamed gear, and bearings for said shaft located on opposite sides of said gears and eccentric, said parts operating to convert the rotary motion of said driving member into within. said member, a flanged bushing surroundingsaid shaft and having an extension, a stud clamped to send extension, an

eccentric on said stud, gearing connecting "said driving member and eccentric, a recipshaft'on opposite sides of said gearing and eccentric, and connections between said eccentric and shaft co-operating with said eccentric to convert rotary motion of the drivingfmember into oscillatory motion of the sha t.

In testimony whereof I have signed my name to this specification.

FREDERICK M. FURBER. 

